JPH0592963U - Sealed lead acid battery - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a sealed lead acid battery capable of increasing the battery capacity without changing the battery volume and without affecting the battery life. [Structure] The ears 2 of the electrode plate 1 are not outside the electrode plate lattice 3, and a part of the inside of the electrode plate lattice 3 also serves as the ears 2. The poles 4 are connected to the ears 2 inside the electrode plate grid 3 by the welded portions 5.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a sealed lead-acid battery used as a power source for portable equipment and the like.

[0002]

[Prior Art]

 In a conventional sealed lead-acid battery of this type, as shown in FIG. 2, an ear portion 2 of an electrode plate 1 is provided so as to project to the outside of an electrode plate body 3, and the ear pole 2 is attached to the ear portion 2. Was welded at the weld 5 to form a battery. Reference numeral 6 is a molding cap attached to the bipolar pole 4.

To increase the capacity of such a sealed lead-acid battery, it is generally performed by increasing the amount of active material or increasing the porosity of the electrode plate, depending on the discharge rate.

[0004]

[Problems to be solved by the device]

 However, the former is effective when the battery has a sufficient volume, but is not suitable when it is not. The latter improves the utilization rate of the active material, but the amount of the active material decreases as the porosity increases, which is unlikely to lead to an increase in the overall capacity, and may shorten the battery life. Further, in the structure shown in FIG. 2, the welded portion 5 becomes a dead space, which is an ineffective space for increasing the capacity of the battery. An object of the present invention is to provide a sealed lead-acid battery capable of increasing the capacity of the battery without changing the battery volume and affecting the battery life.

[0005]

[Means for Solving the Problems]

 The structure of the present invention that achieves the above-mentioned object will be described. In the sealed lead storage battery according to the present invention, the ears of the electrode plate are not outside the electrode plate grid, but a part inside the electrode plate grid. Also serves as the ear portion, and a pole is connected to the ear portion inside the electrode plate lattice.

[0006]

[Action]

 In this way, the ears of the electrode plate are formed in a part of the inside of the electrode plate grid, and when the ears and the poles are connected, the dead space at the connection point that was conventionally present outside the electrode plate grid is Can be eliminated.

Further, the dead space inside the conventional sealed lead-acid battery is made an electrode plate (active material) effective for the discharge reaction, whereby the battery capacity can be increased.

Therefore, the electrode plate design of the present invention allows the battery to have a high capacity without changing the battery volume, and the electrode plate porosity does not change, so that the battery life is the same as the conventional one.

[0009]

【Example】

 FIG. 1 shows an embodiment of a sealed lead acid battery according to the present invention. The parts corresponding to those in FIG. 2 described above are denoted by the same reference numerals.

In the sealed lead-acid battery of the present embodiment, the ears 2 of the electrode plate 1 are not outside the electrode plate grid body 3, and a part of the inside of the electrode plate grid body 3 also serves as the electrode plate. The poles 4 are connected to the ears 2 inside the lattice 3 by welding.

When the sealed lead acid battery according to the present invention and the sealed lead acid battery of the conventional structure were compared, the following results were obtained.

The electrode plate 1 of the present invention shown in FIG. 1 has a design of 6.5 × 4.3 × 0.21 cm. On the other hand, the conventional electrode plate 1 had a design of 6.5 × 3.8 × 0.21 cm and the ears were 0.5 cm.

The amount of active material held on the electrode plate 1 shown in FIG. 2 is about 14.3 g, while the amount of active material held on the electrode plate 1 shown in FIG. 1 is about 16.3 g, about 14%. Increased the amount of active material.

FIG. 3 shows a comparison diagram of the discharge curves by the sealed lead acid battery of the present invention and the sealed lead acid battery of the conventional product by 1 A discharge (final voltage 5.5 V).

FIG. 4 is a comparison of the cycle life characteristics of the sealed lead acid battery of the present invention and the conventional sealed lead acid battery of 1 A discharge (final voltage 5.5 V), 1.6 Acut, 7.42 V, 3.5 hours charge. The figure is shown.

As a result, it was confirmed that the battery capacity was increased as the active material amount was increased by 14%, and the cycle life characteristics were not affected.

[0017]

[Effect of the device]

 As described above, in the sealed lead-acid battery according to the present invention, the ears of the electrode plate are formed in a part of the inside of the electrode plate grid, and the location of the ears and the poles are connected. It is possible to eliminate the dead space at the connection point existing outside the plate body.

Further, the dead space inside the conventional sealed lead-acid battery is made to be an electrode plate (active material) effective for the discharge reaction, whereby the battery capacity can be increased.

Therefore, according to the present invention, the capacity of the battery can be increased without changing the battery volume, and the porosity of the electrode plate is not changed, so that the battery life can be the same as the conventional one. .

[Brief description of drawings]

FIG. 1 is a side view of a main part of a sealed lead acid battery according to the present invention.

FIG. 2 is a side view of a main part of a conventional sealed lead acid battery.

FIG. 3 is a comparison diagram of discharge curves of a conventional battery and a battery of the present invention.

FIG. 4 is a comparison diagram showing cycle life characteristics of a conventional battery and a battery of the present invention.

[Explanation of symbols]

 1 Pole plate 2 Ear part 3 Pole plate grid 4 Pole column 5 Welding part 6 Molding cap

Claims (1)

[Scope of utility model registration request] 1. The ears of the electrode plate are not outside the electrode plate grid,
A sealed lead-acid battery, wherein a part of the inside of the electrode plate grid also serves as the ear portion, and a pole is connected to the inside ear portion of the electrode plate grid body.